#
Introduction to Power Analysis
Two-Group Studies

- E. C. Hedberg - Abt Associates Inc., USA

**Volume:**176

**Introduction to Power Analysis: Two-Group Studies** provides readers with the background, examples, and explanation they need to read technical papers and materials that include complex power analyses. This clear and accessible guide explains the components of test statistics and their sampling distributions, and author Eric Hedberg walks the reader through the simple and complex considerations of this research question. Filled with graphics and examples, the reader is taken on a tour of power analyses from covariates to clusters, seeing how the complicated task of comparing two groups, and the power analysis, can be made easy.

### Supplements

The

**open-access Student Study Site**includes

**example power analyses using the major software packages**(SPSS, Stata, and R), complete with code and output.

“**Introduction to Power Analysis** provides detailed coverage of the topic in a succinct and concise way. Graduate students and others (including faculty who are also researchers) can benefit from this resource as it outlines the steps to conduct and evaluate power analysis to produce rigorous quantitative research in the social sciences, as well as why power analysis and effects are important to understand and apply in research.”

**Texas Tech University**

“Although there are a number of software programs available for power analysis, this volume teaches the reader how to employ power analysis using a popular software program (R) that can also be used to perform the desired statistical analyses on the data.”

**Missouri State University**

### Sample Materials & Chapters

Chapter 3: General topics in hypothesis testing and power analysis when the popu